631 lines
15 KiB
C
631 lines
15 KiB
C
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/*++
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Copyright (c) 1993-1996 Microsoft Corporation
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Module Name:
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nvram.c
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Abstract:
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ARC/NV-RAM manipulation routines for 32-bit winnt setup.
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Also works on boot.ini on i386 machines.
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Author:
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Ted Miller (tedm) 19-December-1993
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Revision History:
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--*/
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#include "nvram.h"
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typedef enum {
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BootVarSystemPartition,
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BootVarOsLoader,
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BootVarOsLoadPartition,
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BootVarOsLoadFilename,
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BootVarLoadIdentifier,
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BootVarOsLoadOptions,
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BootVarCountdown,
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BootVarMax
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} BOOT_VARS;
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PWSTR BootVarNames[BootVarMax] = { L"SYSTEMPARTITION",
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L"OSLOADER",
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L"OSLOADPARTITION",
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L"OSLOADFILENAME",
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L"LOADIDENTIFIER",
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L"OSLOADOPTIONS",
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L"COUNTDOWN"
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};
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PWSTR PaddedBootVarNames[BootVarMax] = { L"SYSTEMPARTITION",
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L" OSLOADER",
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L"OSLOADPARTITION",
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L" OSLOADFILENAME",
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L" LOADIDENTIFIER",
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L" OSLOADOPTIONS",
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L" COUNTDOWN"
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};
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#ifndef i386
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//
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// Helper macro to make object attribute initialization a little cleaner.
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//
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#define INIT_OBJA(Obja,UnicodeString,UnicodeText) \
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\
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RtlInitUnicodeString((UnicodeString),(UnicodeText)); \
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\
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InitializeObjectAttributes( \
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(Obja), \
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(UnicodeString), \
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OBJ_CASE_INSENSITIVE, \
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NULL, \
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NULL \
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)
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BOOL
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DoSetNvRamVar(
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IN PWSTR VarName,
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IN PWSTR VarValue
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)
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{
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UNICODE_STRING U1,U2;
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RtlInitUnicodeString(&U1,VarName);
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RtlInitUnicodeString(&U2,VarValue);
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return(NT_SUCCESS(NtSetSystemEnvironmentValue(&U1,&U2)));
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}
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VOID
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PrintNvRamVariable(
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IN PWSTR VariableName,
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IN PWSTR VariableValue
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)
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{
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PWSTR pEnd;
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WCHAR c;
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BOOL FirstComponent = TRUE;
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while(*VariableValue) {
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//
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// Find the termination of the current component,
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// which is either a ; or 0.
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//
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pEnd = wcschr(VariableValue,L';');
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if(!pEnd) {
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pEnd = wcschr(VariableValue,0);
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}
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c = *pEnd;
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*pEnd = 0;
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wprintf(
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L"%s%s %s\n",
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FirstComponent ? VariableName : L" ",
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FirstComponent ? L":" : L" ",
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VariableValue
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);
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*pEnd = c;
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VariableValue = pEnd + (c ? 1 : 0);
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FirstComponent = FALSE;
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}
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}
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VOID
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RotateNvRamVariable(
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IN PWSTR VariableValue
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)
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{
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PWSTR pEnd;
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WCHAR Buffer[32768];
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//
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// Find the termination of the current component,
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// which is either a ; or 0.
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//
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pEnd = wcschr(VariableValue,L';');
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if(!pEnd) {
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pEnd = wcschr(VariableValue,0);
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}
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//
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// Copy VariableValue into Buffer starting at second entry
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//
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wcscpy(Buffer, pEnd + (*pEnd ? 1 : 0));
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//
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// Append first entry at the end of Buffer
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//
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if (*pEnd) wcscpy(Buffer + wcslen(Buffer), L";");
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*pEnd = 0;
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wcscpy(Buffer + wcslen(Buffer), VariableValue);
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//
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// Copy whole thing back into VariableValue
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//
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wcscpy(VariableValue, Buffer);
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}
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int _cdecl main(
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IN int argc,
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IN char *argv[]
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)
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{
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DWORD var;
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UNICODE_STRING UnicodeString;
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NTSTATUS Status;
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BOOLEAN OldPriv;
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WCHAR Buffer[32768];
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WCHAR Buffer1[32768];
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WCHAR Buffer2[32768];
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Status = RtlAdjustPrivilege(
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SE_SYSTEM_ENVIRONMENT_PRIVILEGE,
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TRUE,
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FALSE,
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&OldPriv
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);
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if(!NT_SUCCESS(Status)) {
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wprintf(L"Insufficient privilege.\n");
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return(0);
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}
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if(argc == 1) {
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for(var=0; var<BootVarMax; var++) {
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RtlInitUnicodeString(&UnicodeString,BootVarNames[var]);
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Status = NtQuerySystemEnvironmentValue(
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&UnicodeString,
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Buffer,
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SIZECHARS(Buffer),
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NULL
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);
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if(NT_SUCCESS(Status)) {
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PrintNvRamVariable(PaddedBootVarNames[var],Buffer);
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} else {
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wprintf(L"%s: <empty>\n",PaddedBootVarNames[var]);
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}
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wprintf(L"\n");
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}
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}
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if((argc == 2) && !lstrcmpiA(argv[1],"rotate")){
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for(var=0; var<BootVarMax; var++) {
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RtlInitUnicodeString(&UnicodeString,BootVarNames[var]);
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Status = NtQuerySystemEnvironmentValue(
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&UnicodeString,
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Buffer,
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SIZECHARS(Buffer),
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NULL
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);
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if(NT_SUCCESS(Status)) {
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RotateNvRamVariable(Buffer);
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printf(
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"Setting variable %ws to %ws [%s]\n",
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UnicodeString.Buffer,
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Buffer,
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DoSetNvRamVar(UnicodeString.Buffer,Buffer) ? "OK" : "Error"
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);
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} else {
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wprintf(L"%s: <empty>\n",PaddedBootVarNames[var]);
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}
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wprintf(L"\n");
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}
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}
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if((argc == 5) && !lstrcmpiA(argv[1]+1,"set") && !lstrcmpA(argv[3],"=")) {
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MultiByteToWideChar(
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CP_OEMCP,
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MB_PRECOMPOSED,
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argv[2],
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-1,
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Buffer1,
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SIZECHARS(Buffer1)
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);
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MultiByteToWideChar(
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CP_OEMCP,
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MB_PRECOMPOSED,
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argv[4],
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-1,
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Buffer2,
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SIZECHARS(Buffer2)
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);
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printf(
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"Setting variable %ws to %ws [%s]\n",
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Buffer1,
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Buffer2,
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DoSetNvRamVar(Buffer1,Buffer2) ? "OK" : "Error"
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);
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}
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return(0);
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}
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#else
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TCHAR LoadID[500]; // load identifier (no quotes)
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TCHAR CountDown[100]; // countdown timer
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TCHAR OsLoadOptions[500]; // load options
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TCHAR OsName[500]; // name of default os
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TCHAR OsLine[500]; // complete line of os description and options
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#define STR_BOOTINI TEXT("c:\\boot.ini")
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#define STR_BOOTLDR TEXT("boot loader")
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#define STR_TIMEOUT TEXT("timeout")
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#define STR_DEFAULT TEXT("default")
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#define STR_OPERATINGSYS TEXT("operating systems")
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#define STR_NULL TEXT("")
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//
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// HandleOption - add option to OsLoadOptions
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//
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VOID HandleOption( TCHAR* Option )
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{
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TCHAR SlashOption[200];
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TCHAR SlashOptionSlash[200];
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//
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// find out if option already exists
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// add blank to end to prevent debug from matching debugport
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//
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wsprintf( SlashOption, TEXT("/%s "), Option );
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wsprintf( SlashOptionSlash, TEXT("/%s/"), Option );
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if( wcsstr( OsLoadOptions, SlashOption ) ||
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wcsstr( OsLoadOptions, SlashOptionSlash ) )
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{
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printf("option already exists: %ws\n",Option);
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}
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else
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{
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//
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// append option without the trailing blank
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//
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printf("added option %ws\n",Option);
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lstrcat( OsLoadOptions, TEXT("/") );
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lstrcat( OsLoadOptions, Option );
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}
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}
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//
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// WriteBootIni - update the boot.ini file with our changes
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//
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VOID WriteBootIni()
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{
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DWORD FileAttr;
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//
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// Get file attributes of boot.ini for later restoration
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//
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FileAttr= GetFileAttributes( STR_BOOTINI );
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//
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// Change file attributes on boot.ini so we can write to it.
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//
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if( !SetFileAttributes( STR_BOOTINI, FILE_ATTRIBUTE_NORMAL ) )
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{
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printf("Failed to turn off read-only on boot.ini (lasterr= %d)\n",
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GetLastError() );
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}
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//
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// Update boot.ini strings
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//
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if( !WritePrivateProfileString( STR_BOOTLDR, STR_TIMEOUT,
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CountDown, STR_BOOTINI ) )
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{
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printf("failed to write timeout (lasterr= %d)\n",GetLastError());
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}
|
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//
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// create the osline from its parts
|
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//
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wsprintf(OsLine, TEXT("\"%s\"%s"), LoadID, OsLoadOptions );
|
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if( !WritePrivateProfileString( STR_OPERATINGSYS, OsName,
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OsLine, STR_BOOTINI ) )
|
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{
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printf("failed to write OS line (lasterr= %d)\n",GetLastError());
|
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|
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}
|
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|
|
|
||
|
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//
|
||
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// Restore boot.ini file attributes
|
||
|
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//
|
||
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|
||
|
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if( FileAttr != 0xFFFFFFFF )
|
||
|
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{
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|
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SetFileAttributes( STR_BOOTINI, FileAttr );
|
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|
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}
|
||
|
|
|
||
|
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}
|
||
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|
||
|
|
//
|
||
|
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// Usage - print out usage information
|
||
|
|
//
|
||
|
|
|
||
|
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VOID Usage()
|
||
|
|
{
|
||
|
|
printf("\nUsage:\n");
|
||
|
|
printf(" no parameters: prints current settings.\n");
|
||
|
|
printf(" /set parameter = value : sets value in boot.ini\n");
|
||
|
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printf(" rotate : rotates default build through boot options\n");
|
||
|
|
printf("\n");
|
||
|
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printf("Example: nvram /set osloadoptions = debug\n");
|
||
|
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printf(" This will set the debug option on\n\n");
|
||
|
|
printf("Available options:\n");
|
||
|
|
printf(" loadidentifier, osloadoptions, countdown\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
int _cdecl main(
|
||
|
|
IN int argc,
|
||
|
|
IN char *argv[]
|
||
|
|
)
|
||
|
|
{
|
||
|
|
DWORD dwStatus;
|
||
|
|
LPWSTR* pArgs;
|
||
|
|
|
||
|
|
// parse command line in unicode
|
||
|
|
|
||
|
|
pArgs= CommandLineToArgvW( GetCommandLine(), &argc );
|
||
|
|
|
||
|
|
//
|
||
|
|
// Get the boot information from boot.ini
|
||
|
|
//
|
||
|
|
|
||
|
|
// timeout
|
||
|
|
|
||
|
|
dwStatus= GetPrivateProfileString(
|
||
|
|
STR_BOOTLDR,
|
||
|
|
STR_TIMEOUT,
|
||
|
|
STR_NULL,
|
||
|
|
CountDown,
|
||
|
|
SIZECHARS(CountDown),
|
||
|
|
STR_BOOTINI );
|
||
|
|
if( !dwStatus )
|
||
|
|
{
|
||
|
|
printf("Failed to get timeout value\n");
|
||
|
|
return(-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
// default os description and options
|
||
|
|
|
||
|
|
dwStatus= GetPrivateProfileString(
|
||
|
|
STR_BOOTLDR,
|
||
|
|
STR_DEFAULT,
|
||
|
|
STR_NULL,
|
||
|
|
OsName,
|
||
|
|
SIZECHARS(OsName),
|
||
|
|
STR_BOOTINI );
|
||
|
|
if( !dwStatus )
|
||
|
|
{
|
||
|
|
printf("Failed to get default OS name\n");
|
||
|
|
return(-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
dwStatus= GetPrivateProfileString(
|
||
|
|
STR_OPERATINGSYS,
|
||
|
|
OsName,
|
||
|
|
STR_NULL,
|
||
|
|
OsLine,
|
||
|
|
SIZECHARS(OsLine),
|
||
|
|
STR_BOOTINI );
|
||
|
|
if( !dwStatus )
|
||
|
|
{
|
||
|
|
printf("Failed to get default os description\n");
|
||
|
|
return(-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Now parse the line into description and options.
|
||
|
|
// If it starts with a quote, it may have options.
|
||
|
|
// If it doesn't start with a quote, it won't.
|
||
|
|
//
|
||
|
|
|
||
|
|
*LoadID= *OsLoadOptions= TEXT('\0');
|
||
|
|
|
||
|
|
if( *OsLine == TEXT('"') )
|
||
|
|
{
|
||
|
|
INT i;
|
||
|
|
|
||
|
|
for( i=1; OsLine[i]; i++ )
|
||
|
|
{
|
||
|
|
LoadID[i-1]= OsLine[i];
|
||
|
|
if( OsLine[i] == TEXT('"') )
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if( OsLine[i] )
|
||
|
|
{
|
||
|
|
LoadID[i-1]= TEXT('\0'); // don't copy final quote
|
||
|
|
lstrcpy( OsLoadOptions, &OsLine[i+1] );
|
||
|
|
lstrcat( OsLoadOptions, TEXT(" ") ); // all options end with blank
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
lstrcpy( LoadID, OsLine );
|
||
|
|
lstrcpy( OsLoadOptions, TEXT("") );
|
||
|
|
}
|
||
|
|
|
||
|
|
// no parameters prints out values
|
||
|
|
|
||
|
|
if( argc == 1 )
|
||
|
|
{
|
||
|
|
printf("%ws: %ws\n",PaddedBootVarNames[BootVarLoadIdentifier], LoadID);
|
||
|
|
printf("%ws: %ws\n",PaddedBootVarNames[BootVarOsLoadOptions], OsLoadOptions);
|
||
|
|
printf("%ws: %ws\n",PaddedBootVarNames[BootVarCountdown], CountDown);
|
||
|
|
}
|
||
|
|
|
||
|
|
// -set parameter = value
|
||
|
|
// sets parameter to some value
|
||
|
|
|
||
|
|
if( (argc == 2) &&
|
||
|
|
!lstrcmpiW(pArgs[1],L"rotate") )
|
||
|
|
{
|
||
|
|
INT i;
|
||
|
|
DWORD FileAttr;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Read in all boot options
|
||
|
|
//
|
||
|
|
|
||
|
|
dwStatus= GetPrivateProfileString(
|
||
|
|
STR_OPERATINGSYS,
|
||
|
|
NULL,
|
||
|
|
STR_NULL,
|
||
|
|
OsLine,
|
||
|
|
SIZECHARS(OsLine),
|
||
|
|
STR_BOOTINI );
|
||
|
|
if( !dwStatus )
|
||
|
|
{
|
||
|
|
printf("Failed to get os section\n");
|
||
|
|
return(-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// read through boot options until we find default entry
|
||
|
|
//
|
||
|
|
|
||
|
|
i = 0;
|
||
|
|
|
||
|
|
while( lstrcmpiW( OsName, &(OsLine[i]) ) ){
|
||
|
|
|
||
|
|
i = i + wcslen(&OsLine[i]) + 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// increment one more entry
|
||
|
|
//
|
||
|
|
|
||
|
|
i = i + wcslen(&OsLine[i]) + 1;
|
||
|
|
|
||
|
|
//
|
||
|
|
// if we've gone off the end then start over
|
||
|
|
//
|
||
|
|
|
||
|
|
if (!lstrcmpiW( &(OsLine[i]), L"\0\0" ) ){
|
||
|
|
i = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Get file attributes of boot.ini for later restoration
|
||
|
|
//
|
||
|
|
|
||
|
|
FileAttr= GetFileAttributes( STR_BOOTINI );
|
||
|
|
|
||
|
|
//
|
||
|
|
// Change file attributes on boot.ini so we can write to it.
|
||
|
|
//
|
||
|
|
|
||
|
|
if( !SetFileAttributes( STR_BOOTINI, FILE_ATTRIBUTE_NORMAL ) )
|
||
|
|
{
|
||
|
|
printf("Failed to turn off read-only on boot.ini (lasterr= %d)\n",
|
||
|
|
GetLastError() );
|
||
|
|
}
|
||
|
|
|
||
|
|
if( !WritePrivateProfileString( STR_BOOTLDR, STR_DEFAULT,
|
||
|
|
&(OsLine[i]), STR_BOOTINI ) )
|
||
|
|
{
|
||
|
|
printf("failed to write default (lasterr= %d)\n",GetLastError());
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Restore boot.ini file attributes
|
||
|
|
//
|
||
|
|
|
||
|
|
if( FileAttr != 0xFFFFFFFF )
|
||
|
|
{
|
||
|
|
SetFileAttributes( STR_BOOTINI, FileAttr );
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
if( (argc == 5) &&
|
||
|
|
!lstrcmpiW(pArgs[1]+1,L"set") &&
|
||
|
|
!lstrcmpW(pArgs[3],L"=") )
|
||
|
|
{
|
||
|
|
INT i;
|
||
|
|
|
||
|
|
// see if we understand parameter
|
||
|
|
|
||
|
|
for( i=0; i<BootVarMax; i++ )
|
||
|
|
{
|
||
|
|
if( lstrcmpiW( pArgs[2], BootVarNames[i] ) == 0 )
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// handle the ones we can
|
||
|
|
|
||
|
|
switch( i )
|
||
|
|
{
|
||
|
|
default:
|
||
|
|
printf("Not valid parameter name to set: %ws\n",pArgs[2]);
|
||
|
|
Usage();
|
||
|
|
return(-1);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case BootVarLoadIdentifier:
|
||
|
|
lstrcpyW( LoadID, pArgs[4] );
|
||
|
|
break;
|
||
|
|
|
||
|
|
case BootVarOsLoadOptions:
|
||
|
|
HandleOption( pArgs[4] );
|
||
|
|
break;
|
||
|
|
|
||
|
|
case BootVarCountdown:
|
||
|
|
lstrcpyW( CountDown, pArgs[4] );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
WriteBootIni();
|
||
|
|
}
|
||
|
|
|
||
|
|
// -?
|
||
|
|
// usage message
|
||
|
|
|
||
|
|
if( argc == 2 && !lstrcmpW(pArgs[1]+1, L"?") )
|
||
|
|
{
|
||
|
|
Usage();
|
||
|
|
}
|
||
|
|
|
||
|
|
return(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|